Datasheet

Data Sheet ADP2370/ADP2371
Rev. C | Page 3 of 32
SPECIFICATIONS
V
IN
= V
OUT
+ 1 V or 3.2 V, whichever is greater, EN = V
IN
, I
OUT
= 100 mA, C
IN
= 10 μF, C
OUT
= 10 µF, T
A
= 25°C for typical specifications,
T
J
= −40°C to +125°C for minimum/maximum specifications, unless otherwise noted.
Table 1.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
SUPPLY
Input Voltage Range V
IN
3.2 15 V
Quiescent Current I
Q-PSM
FSEL = V
IN
, SYNC = 0 V, no load, device not
switching
13.5 μA
I
Q-PWM
FSEL = V
IN
, SYNC = V
IN
, no load, device not
switching
725 μA
I
SW-PWM
FSEL = V
IN
, SYNC = V
IN
, no load, device switching 5.7 mA
Shutdown Current I
SHUT
EN = GND, T
J
= −40°C to +85°C 1.2 3.5 μA
FIXED OUTPUT
Output Current I
OUT
800 mA
Fixed Output Accuracy V
OUT
Initial set point, I
OUT
= 250 mA, T
J
= 25°C −1 +1 %
I
OUT
= 250 mA −1.5 +1.5 %
No load to full load, PWM mode −3 +3 %
ADJUSTABLE OUTPUT
Feedback Voltage V
FB
0.8 V
Feedback Voltage Accuracy V
FB-TOL
Initial set point, I
OUT
= 250 mA, T
J
= 25°C −1 +1 %
Output Voltage Range V
OUT-ADJ
No load to full load 0.8 14 V
FIXED AND ADJUSTABLE OUTPUT
Load Regulation ∆V
OUT
/∆I
OUT
No load to full load 0.125 %/A
Line Regulation ∆V
OUT
/∆V
IN
I
OUT
= 250 mA 0.01 %/V
Efficiency EFF I
OUT
= 250 mA, V
IN
= 7.2 V, V
OUT
= 3.3 V 92 %
Overcurrent Frequency Foldback Threshold
Rising OC
FOLDBACK-RISE
% of V
OUT
, V
OUT
rising 50 %
Falling OC
FOLDBACK-FALL
% of V
OUT
, V
OUT
falling 37.5 %
PSM Threshold PSM
THRESHOLD
V
IN
= 7.2 V, V
OUT
= 3.3 V 170 mA
Feedback Pin Input Current
Fixed I
FB-FIXED
Fixed output voltage model 2.5 μA
Adjustable I
FB-ADJUST
Adjustable output voltage model 10 nA
Minimum On Time ON-TIME
MIN
V
IN
< 5.5 V 65 100 ns
V
IN
> 5.5 V 40 60 ns
Soft Start Time SS
TIME
When EN rises from 0 V to V
IN
, and V
OUT
= 0.9 × V
OUT
350 μs
Active Pull-Down Resistance
(ADP2371)
R
PULL-DOWN
260 400 Ω
POWER SWITCH
P-Channel On Resistance RDS
ON-P
V
IN
> 5.5 V, I
OUT
= 400 mA 400 mΩ
V
IN
< 5.5 V, I
OUT
= 400 mA 500 mΩ
N-Channel On Resistance RDS
ON-N
V
IN
> 5.5 V, I
OUT
= 400 mA 280 mΩ
V
IN
< 5.5 V, I
OUT
= 400 mA 400 mΩ
Current Limit
P-Channel
I
LIM-P
Peak inductor current
1200
1300
mA
N-Channel I
LIM-N
Peak inductor current 500 550 mA
Leakage Current I
LEAK-SW
P-Channel 0.01 1 μA
N-Channel 0.01 1 μA